Add 1.6x mode.

ui/display/manager/chromeos/display_change_observer.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/display/manager/chromeos/display_change_observer.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
@@ skipping 19 matching lines @@
 namespace display {
 namespace {
 
 // The DPI threshold to determine the device scale factor.
 // DPI higher than |dpi| will use |device_scale_factor|.
 struct DeviceScaleFactorDPIThreshold {
   float dpi;
   float device_scale_factor;
 };
 
-const DeviceScaleFactorDPIThreshold kThresholdTable[] = {
+const DeviceScaleFactorDPIThreshold kThresholdTableForInternal[] = {
     {220.0f, 2.0f},
-    {180.0f, 1.5f},
+    {200.0f, 1.6f},
     {150.0f, 1.25f},
     {0.0f, 1.0f},
 };
 
 // 1 inch in mm.
 const float kInchInMm = 25.4f;
 
 // The minimum pixel width whose monitor can be called as '4K'.
 const int kMinimumWidthFor4K = 3840;
 
@@ skipping 230 matching lines @@
   // there aren't any touchscreens to associate. For the second case, the
   // displays and touch input-devices will get associated when display
   // configuration finishes.
   const auto& cached_displays = display_configurator_->cached_displays();
   if (!cached_displays.empty())
     OnDisplayModeChanged(cached_displays);
 }
 
 // static
 float DisplayChangeObserver::FindDeviceScaleFactor(float dpi) {
-  for (size_t i = 0; i < arraysize(kThresholdTable); ++i) {
-    if (dpi > kThresholdTable[i].dpi)
-      return kThresholdTable[i].device_scale_factor;
+  for (size_t i = 0; i < arraysize(kThresholdTableForInternal); ++i) {
+    if (dpi > kThresholdTableForInternal[i].dpi)
+      return kThresholdTableForInternal[i].device_scale_factor;
   }
   return 1.0f;
 }
 
 }  // namespace display